Spike-drawing device



Nov. 25,- 1930. J. F. STRAUBE SPIKE DRAWING DEVICE Filed Sept. 28, 1928 INVENTOR JZZW, FfifrawZe BY Patented Nov; 25, 1930 j UNITED STATES "PATENT OFFICE JOHN F. srRAUBE, or ELkHonmNEBRAsKA, ASSI anon or? ONE-FOURTH To Arms SWANSON, or FREMONT, NEBRASKA SPIKE-DRAWING DEVICE Application 'filed September 28, 1928. Serial No. 308,950.

10 and apply distributed force where it is most needed, and also will conserve the applied energy'by the use of'pivotal fulcrums so as to eliminate loss thereof through frictional a contact of its parts. j V 15 A'further object is to provide a device of this-character with interchangeable aws so as to permit adaptation to various conditions and removal for the purpose of sharpening or repairing, V j

A further object is to provide a device wherein upright posts secured upon a substantial base carry pivotally fulcrumed levers provided with interchangeable spike extracting aws, andadapted to be forced down- 25. wardly by a second lever pivotally fulcrumed between post-s mounted upon the'rear end of the base; the two levers being connected by i a lifting bar pivotallyjoined .to the upper lever and slidably engaging the" lower lever so asto bring thejaw into position for engagement below the head of a spike.

With the above and other objects in view the invention resides in the combination and arrangment of partsas hereinafter set forth,"

shown in the drawing, described and claimed, it being understood that changes in the precise embodiment of the invention may be made within the scope of what is planned without departingfrom the spirit of the 1n 7 vention. r a

In the drawing Figure 1 is a top plan view of the device. V l j 2 L beneath the lever 6 and adaptedxto lift Referring to the drawing, the numeral 1' W5 designates the'base of a supporting frame comprising upright posts Zand disposed Figure 2 is a side elevation of the device.-

adjacent the forward end thereof upon trans verse brackets l and 5, said posts carrying between them a longitudinally disposed lever pivoted on a transverse bolt passing through the said posts. Disposed upon the end 'of the said lever adjacent its pivotal pointand attached thereto by means of bolts T 8 is a spike lifting jaw 9 provided'with a flared recess 10' adapted to engage a spike below the head and withdraw it from its setting. Lever 6 extends rearwardly in longitudinal relation to the base 1, between upwardly extending posts 11 and 12, adjacent therearend of the basel upon transverse footing 1 said posts 11 and 12 have piv-I otally mounted therebetween at'their upper extremity a curved lever l l which has its pivoted point 15 at the curve in thelever.

The lower ends of the braces 16 are connected to bolt 7 thusaflording reinforcement against the applied force tending to draw the said post rearwardly: Thelower end of the lever T14: "is provided with an anti friction wheel .17 adapted to engage the upper side of the lever 6 when-thesaid lever is movedupwardiv and the wheel ,1? assumes the position 17 indicated by the broken lines at the up wardextremity of its path, this being" the normal position 'atthe beginning ofthe spike drawing operation. Asthe lever 14 ismoved downwardly the wheel 17 engagesthe lever 6, which. thus receives an amplified force largely in excess of that applied at the end of the said lever 14 by the operator, and this force is further amplified by thesecond lever 6 which is fulcrumed fora more intensified application ofthe first force; A

Avery intenseupward force is eirerted at the jaws through the compound leversystems which the deviceaii'ords. Provision for rais- 2 ing the lever 6 simultaneously with an upward movement of the leverlt is made l through the provision of downwardly extend ing members 23 disposed to the sides of the lever 14, and which downwardly extending members have disposed therebetween a wheel l with an upward 1 posts mountedupon the forward end ofsaid base, a lever pivotally fulcrumedintermediate 11 set forthwhat the posts, a jaw carriedby said lever, posts mounted upon the rear end of said base, a second lever pivotally fulerumed intermediate the second named posts, Wheels rotatably mount-ed adjacent the lower end of and on said lever and oppositely disposed above and below the first lever and reinforcing bars connecting the fulcruined pivots of both levers.

In testimony whereof I hereunto mfix my signature.

JOHN F. STRAUBE. 

